Graphs – implications Flashcards
From what graph can speed be calculated? (name + method)
distance-time graph; divide given distance by time taken to travel it
Graph used to calculate acceleration (name + method)
velocity-time graph; change in velocity ÷ change in time
Graph used to calculate distance (name + method)
speed-time graph; multiply values on both axes in a precise region
How can the distance travelled by an object with increasing/decreasing speed be calculated from a speed-time graph?
Use the formula for the area of a triangle (1/2bh, b is total time, h is speed) to calculate the area below the plotted line.
How can the average velocity of an ever-accelerating car be calculated?
Divide the object’s acceleration by the time taken.
State how constant speed is represented on a speed-time graph.
A straight, horizontal line while the object maintains a specific speed
State how constant speed is represented on a distance-time graph.
A diagonal line with a positive gradient (extending to the top-right corner of the graph)
State how constant acceleration is represented on a velocity-time graph. (2 ways)
A diagonal line with a positive gradient (extending to the top-right corner of the graph)
How is a stationary object represented by a distance-time graph?
It is shown with a flat line either at zero or a set, unchanging distance extending from the y-axis to the right.
How is increasing/decreasing speed represented on a speed-time graph?
A diagonal line extending to the opposite corner, upward/downward
In what way is ZERO acceleration represented by a velocity-time graph?
It is shown via a flat line extending from the y-axis (a given velocity) to the right of the graph.
Explain the difference between a horizontal line on a velocity-time vs distance-time graph
Velocity-time graph: zero acceleration, therefore object maintains a constant (unchanging) velocity.
Distance-time graph: zero speed, therefore object is stationary.
